Illustrate the differences between the strategy of functional group addition (FGA) and functional group interconversion (FGI) as used in retrosynthetic analysis. (3 Marks) You may use short illustrations if necessary. (b) Propose a stereospecific synthesis of the pheromone (bombykol) of the silkworm moth based on the partial retrosynthetic scheme below that uses the Suzuki coupling reaction as an important step in the reaction. (6 Marks) HO Bombykol TBDMSO In addition to other reagents use also these reagents: (1) lithiumdipropylcpprate (2) Ethyne . I Starting material OH